<html>
    <head>
        <title>title</title>
        <meta charset="UTF-8">
    </head>
    <body>
        <?php 
            $css = 80;
            $sj = 86;
            $javascrip = 82;
            $Ave = ($css + $javascrip + $sj)/3 ;
        ?>
        <table>
            <tr>
                <th>课程</th>
                <th>分数</th>
            </tr>
            <tr>
                <th>css</th>
                <th><?php echo $css; ?></th>
            </tr>
            <tr>
                <th>sj</th>
                <th><?php echo $sj; ?></th>
            </tr>
            <tr>
                <th>javascrip</th>
                <th><?php echo $javascrip; ?></th>
            </tr>
            <tr>
                <th>Ave</th>
                <th><?php echo $Ave; ?></th>
            </tr>
        </table>
        
    </body>
</html>